My arches are on the higher side, and these fit wonderfully. They are still a little stiff, but I've been trying not to wear them for casual usage on pavement. I'm a little worried about heel slippage, but I might not be tying them optimally. Grip seems really good, and I really like the way they hug my foot, very similar to the barefoot shoes but w/ support.
This review was written in the old system and had content requirements that are different than reviews written today.